.exercises {
    background-color: #f0ffff;
}

figcaption {
    margin: 0.75em 0;
    text-align: center;
    font: italic 13px/18px Cambria, Georgia, "Times New Roman", Times, serif;
}

img.bookfig {
    margin-left: auto;
    margin-right: auto;
}

.cl_caption {
    text-align: center;
    font-weight: bold;
}

.runestone iframe {
    display: block;
    margin-left: auto;
    margin-right: auto;
}
